software companies hope to make education more exciting with their offerings. >> there are some areas where textbooks are no longer so effective. that is where the cyberclassroom can take over. they can go into the third dimension. >> these new classrooms require active input from users. >> our correspondent is at the frankfurt book fair for us all week. how present our digital books at the fair this year? also, how much of a whole does digital technology have on the german market, would you say -- how much of a hold does digital technology have on the german market? >> the fare is like the biggest book shut you have ever been into, but when you look closely, you see that among these books and also the publishers are displaying their wares, everything is also geared to digital, to reading from the screen. in the u.s., the proportion of books that are now sold digitally is 20%. in germany, that figure is only 2%. it has doubled in germany over the past few years, but it still very small. this is to do with the fact that in germany, there is a regulation regulated by the government call